One Step Equations

What is the solution for x + 9 = 21

• 10
• 12
• 11
• 13

• x = 20
• x = 7
• x = 10
• x = 3

m+13=21

• m=34
• m=8
• m=273
• m=6

Solve for y:
y - 7 = 10

• 17
• -3
• 3
• -17

k+8=15

• k=23
• k=10
• k=7
• k=11

Which choice describes the step needed to isolate the variable? (Tap outside of the gray box to see the equation.)

• Divide both sides by 11
• Multiply both sides by 11.
• Add 11 to both sides.
• Subtract 11 to both sides.

What is the inverse operation of division?

• Division
• Multiplication
• Addition
• Subtraction

Solve the equation
3x = 27. 

• x = 24
• x = 81
• x = 9

x - 62 = 123
How should you show your work to isolate the variable and solve the equation?

• Add 62 to each side. 
• Subtract 62 from each side.
• Multiply each side by 62.
• Add 123 to each side.

x + 12 = 20

• x = 32
• x = -32
• x = 8
• x = -8